Apparatus for eliminating dust and fumes



Feb. 21, 1950 PETTY APPARATUS FOR ELIMINATING DUST AND FUMES Filed Feb.27, 19 6 wem 4 62 QZZ% Patented Feb. 21, l950 APPARATUS FOR ELHWINATINGDUST AND FUMES Daniel H. Petty, Skokie, IlL, assignor to The Hydro-BlastCorporation, Chicago, 111., a corporation of Illinois ApplicationFebruary 27, 1946, Serial No. 650.653

Claims.

This invention relates to apparatus for eliminating dust and fumes andmore particularly to apparatus for collecting and carrying away dust andfumes from a casting shake-out space.

In co-pending application Serial No. 643,189, filed January 24, 1946, byWebster and Petty, there is disclosed and claimed a Method of andapparatus for collecting dust and fumes from a foundry shake-out spacein which the dust and fumes are collected and carried away by parallelhigh velocity water streams. In apparatus of this type unless the Waterstreams or jets are collected with a minimum of impact and splashing,mists tend to accumulate and to roll away from the point of collectionof the water streams, carrying with them wetted dust particles and acertain amount of fumes. It is one of the objects of the presentinvention to provide an improved apparatus in which this condition isminimized or eliminated.

Another object is to provide apparatus in which any mist created aroundthe jets is positively drawn away from the shake-out space.

Still another object is to provide apparatus in which spray and mist inthe shake-out space is minimized.

'Ihe above and other objects and advantages of the invention will bemore readily apparent from the following description when read inconnection with the accompanying drawing, in which- Figure 1 is aperspective view of an apparatus embodying the invention; and

Figure 2 is a diagrammatic end section.

In the form illustrated, the apparatus is adapted to be used on afoundry floor in that portion of the foundry where castings are shakenfrom the molds. As shown, a pit I0 is provided with a grate I throughwhich sand shaken from the molds may pass to be collected and conductedaway for reuse.

The apparatus comprises a pair of spaced parallel walls I2 and I3. Thewall I2 is preferably higher than the Wall l3 and the latter extends tothe bottom of the pit III to separate it into a main portion underlyingthe casting shake-out area and a small back portion M for collectingwater and entrained material. The walls I2 and I3 define a shake-outspace which is open at the top and at both ends so that molds, asindicated at l5, can be carried into the space by cranes operating on atrack |6 above the space. It will be understood that the usual shake-outtable or other apparatus to assist in removing the castings from themolds may be provided in the shakeout space.

The wall |2 carries at its top a series of spaced parallel nozzlesconnected to a header or manifold |8 for supplying water to the nozzlesat a pressure on the order of one thousand pounds per square inch ormore. The nozzles'are arranged to direct spaced parallel water jets l9across the top of the space and over the top of the wall |3, as shown.As explained in the co-pending Webster and Petty application, these jetscreate reversely rotating parallel vortices which draw dust and fumesinto the jets so that they will be carried away from the shake-out spaceto be collected with the water from the jets.

A back wall 2| is spaced back of the wall l3 and extends above the wallI3 to terminate in a forwardly projecting portion 22. The wall 2| ispreferably spaced above the screen or grating IE to provide an airpassage under it which communicates with the space between the back wall2| and an end closure 23. Water from the jets together with dust fumesand air entrained thereby will pass downwardly between the walls |3 and2 the water being collected in the pit section H3. The air together withlighter fumes will flow upwardly between the walls 2| and 23 and may bedirected to any desired point of disposal.

In order to produce a positive'circulation of air and gases includingmist around the jets down between the walls l3 and-2|, a curved baffle24 is provided against which the jets are directed. As shown, the loweredge of the baflie lies sub stantially midway between the top of thewall l3 and the wall 2|, and the baflie extends upward and forward to bespaced from the forwardly extending top 22 of the wall 2|. The baifie isso placed that the jets I9 will strike it substantially tangentially andwill be directed by the baflle down and between the walls I3 and 2|. Theair, dust and fumes entrained by the jets will be carried with the waterto be conducted away from the shake-out space. Air and mist above thejets will be positively drawn into the space between the bafiie 24 andthe top wall portion 22 due to the injector action of the jets createdby the baflie. Thus this mist which may carry with it some dust andfumes is positively drawn away from the shake-out space and is preventedfrom floating out into the foundry area.

To prevent the accumulation of mists adjacent the discharge tips of thenozzles, a second angular baflle 25 may be provided adjacent but spacedfrom the top portion of the wall l2 and produce a positive circulationaround this batlie i to withdraw from the shake-out space dust, air

and fumes as well as any mist which may tend to accumulate adjacent thewall l2. While this 3 bame may be omitted, in many cases it assists inkeeping the shake-out space free from undesirable fumes, dust and mist.While one embodiment of the invention has spaced from the jets. Theaction of the jets will i been shown and described in detail herein, itwill be understood that this is illustrated only and is not intended asa definition of the scope of. the ina 5 vention, reference being had forthis purpose to the appended claims.

What is claimed is: 1. Apparatus for eliminating dust and fumescomprising first and second spaced parallel walls,

a series of nozzles mounted adjacent the top of the first wall andspaced along the top edge of the j first wall to direct a series of,parallel high velocity water jets lying substantially in a plane overthe space between the walls and over the top of the second wall, a backwall spaced back of and extending above the second wall, and a curvedbaflie lying between and spaced from the back wall and said second wall,the baflle extending above the other wall to receive the water jets anddirect the water and entrained material down in the space between thesecond wall and the back wall and means providing a free outlet from thespace between the second wall and the back wall for air entrained by thejets.

2. Apparatus for eliminating dust and fumes comprising first and secondspaced parallel walls, 1 a series of nozzles mounted adjacent the top of1 the first wall and spaced along the top edge of the 1 first wall todirect a series of parallel high velocity water jets lying substantiallyin a plane over the space between the walls and over the 1 top of thesecond wall, a back wall spaced back of andextending above the secondwall, a curved i baflle lying between and spaced from the back 1 walland the second wall, the battle extending above the second wall toreceive the water jets and direct the water and entrained material 1down in the space-between the second wall and the back wall and meansproviding a free outlet 4 first wall to direct a series of parallel highvelocity water jets lying substantially in a plane over the spacebetween the walls and over the top of the second wall, a back wallspaced back of said second wall with its top projecting above the secondwall and angling forward, and a vertically curved baille spaced forwardfrom the top portion of the back wall and terminating between the toppart of the second wall and the back wall and means providing a freeoutlet from the space between the second wall and the back wall for airentrained by the jets.

4. Apparatus for eliminating dust and fumes I comprising spaced parallelvertical walls, a series of nozzles mounted adjacent the top of one wallto direct a series of parallel high velocity water jets substantially ina horizontal plane over the space between the walls and over the top ofthe other wall, and a baifle having a vertical portion spaced inwardlyfrom said one of the walls and having a horizontal portion underlyingthe jets the space between said baflle and the other wall beingunobstructed to provide free upward flow from the space between thewalls to the jets.

5. Apparatus for eliminating dust and fumes from a casting knockoutspace or the like comprising spaced vertical parallel walls of difierentcurving forward above the lower wall to receive the jets and meansproviding a free outlet from the space between the lower wall and theback wall for air entrained by the jets.

DANIEL H. PETTY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,373,231 Gardener et al. Mar.29, 1921 1,539,973 Truxal- June 2, 1925 1,646,243 Handelon Oct. 18, 19271,792,500 Lieberman -1 Feb. 17, 1931 1,868,632 Edge July 26, 19321,926,034 Camerota Sept. 12, 1933 1,994,078 Sielofi Mar. 12, 19352,074,317 Allan et al. Mar. 23, 1937 v 2,088,962 Kleucker Aug. 3, 1937

